Separator-sieve.



No. 735,016. PATENTED JULY 28, 1903., E. E. BITCH L P. M. HAWKINS.

SEPARATOR SIEVE.

APPLICATION FILED JAN. 1o, 1903.

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No.7s5m16. PATBNTED JUL'28,19o& E. E. BITCH a; P. M. HAWKINS.

SE'PARATOR SIEVE.

APPLIOATION FILED JAN. 1o, 190s.

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PATENT OFFICE.

ELMER E. DITOH AND FRANK M. HAWKINS, OF MANSFIELD, OHIO; SAID DITOH ASSIGNOR TO JAMES N. PATTERSON, OF MANSFIELD, OHIO.

sEPARA'roR-SIEVE.

Y SPECIFICATION forming part of Letters' Patent No.`735,016, dated July 28, 1903.

Application filed January 10, 1903. Serial No. 138,463. (No model.)

To all whom, it may concern.:

Be it known that we, ELMER E. DITCH and FRANK M. HAWKINS, citizens of the United States, and residents of Mansfield, in the county of Richland and State of' Ohio, have invented new and useful Improvements in Separator-Sieves, of which the following is a specification.

Our invention relates to separator-sieves of the adjustable type; and it consists in improvements of the construction of Letters PatentNo. 579,793, granted toElmer E. Ditch, bearing date of March 30, 1897, filed October 12, 1896, Serial No. 608,610, for a separator.

The objects of our improvements are, first, to provide a sieve for separators having slats mounted upon a series of crank-shafts which are journaled to a suitable frame in such a relative position to each other as to provide a means of opening, closing, and varying the opening or mesh between them simultaneously through the medium of a suitable connecting-bar, by means of which all sizes and kinds of grains, seed, and grasses can be separated from the chad and cleaned with one Y sieve,thereby obviating the necessity of using a separate sieve of a diderent mesh for each size or kind of grain, dac., threshed; second,

to construct a slat for sieves of such aform or contour, with the lower edge thereof serrated, as will retard the travel of the grain upon the surface, thereby permitting the airblast which is used in conjunction with the sieve in cleaning the grain to perform the function of separating the chaff from the grain to expend its force in so doing for a longer period of time; third, tofprovide a sieve composed of a series of slats mounted to oscillate, swing, or partially rotate upon a series of shafts journaled to a suitable frame in such a manner as to present a series of openings in line with the direction of the airblast; fourth, to provide a means of varying the openings between the slats that can be operated from either side of the separator when it is in operation; fifth, to provide a method of constructing a sieve whereby the cranks and connecting-bar are securely inclosed, preventing the grain or chaff from interfering with the adjusting mechanism of 'the slats. We attain these and other objects by the construction illustrated in the accompanying drawings, in which- Figure l is a top view of the sieve, showing the slats closed, with a portion of the slat and center rib broken away. Fig. 2 is a crosssectional end view taken on the line 2 2 of Fig. l, showing the slats open and end view of the slotted or grooved center journal-bar.

Fig. 3 is a cross-sectional side View of the sieve, taken on the line 3 3, with one ofthe sides of the center journal-bar removed, showing the slats as theyappear with the openings between each series of slats. Fig. 4 is a similar View showing the slats in closed posit ion. Fig. 5 is a perspective view of a section of the centerbar journal in perspective with a portion of one side broken away, showing the method of connecting the cranks whereby the openings between the slats are varied simultaneously. Figs. 6 and 7 respectively are perspective views of sections of a slat, showing the form and method of attaching the slats to the crankshafts. Fig..8 is a top plan View in detail of the adjusting mechanism.

The framed is preferably made rectangular and isvadapted to fit the shoe of a separator. -A center bar o r brace b, having a longitudinal groove or slot c formed therein, is securely fastened to the center of the frame. Two intermediate bars CZ cl are securely attached to the frame between the center bar and side piecesc. of the frame. These hars in conjunction with the frame constitute the framework, upon which the adjusting mechanism and slats are mounted. The framework is provided with a series of bearings e, made in direct alinement with each other and at a predetermined distance apart. Crankshaftsf, having one or more sections of slats securely attached thereto, are journaled in the bearings, leaving the cranks g depending in the groove of the center bar. The slats are journaled with the upper edge h bent downward on an incline. The lower edges of the slats are serrated. A portion i of the lower edge ofl the slats is bent downward to correspond with the upper edge of the slat, and the serrated edge j is upturned, forming a depressed portion to receive the downturned upper end h' of the adjoining slat when the slats arerin closed position, as

IOD

l i I f tions, as shown-in the drawings.

shown in the drawings. This form of contour of the slat leaves a plane furface lo between the turned edges of the Slat. The crank-shafts are journaled in the framework of the sieve, so as to leave the upper edges of the slats, which are attached thereto, overlapping the serrated edges of each succeeding slat. It will be noted that the upper edge of the slat which is bent downward and the downturned portion of the lower edge form a series of troughs m, into which the grain is deposited after leaving the plane surface k of the slat before passing through the mesh of the sieve, which is composed of the serrated edges of the slats. The grain in passing over the plane surface of the slats and in being retarded in its travel by the contour or form of the slats is subject to the separation process of the air-blast for a longer period of time than it is possible to accomplish by the use of the ordinary sieve, resulting in a more thorough separation of the chad from the grain. The shafts are journaled in bearings e, which are provided in the center bar, intermediate bars, and side pieces. We prefer to make the slats in four separate sec- These sections, which form the completed slat, are secured to the shaft in direct alinement with each other by any ordinary fastening means. We prefer to attach the slats to the shafts by depressing a portion 'n of the plane surface of the slats, making it project below the surface. The center portion n is cutout and each side made to form a bearing for the slat. Each section of the slat is securely attached to the shaft by solder, which is poured in the bearing. The cranks g of the shafts are connected together by means cfa connectingharp, having a series of notches p' provided in one edge and adapted to lit the cranks of each shaft and form a support for the connecting-bar. One end q of the connectingbar is screw-threaded and projects through an aperture provided in one end of the frame.

A U or similarly shaped bearing r is attached to the frame and forms a journal for a bevel-gear r2, which is provided witha screwthreaded aperture in the center of the hub and adapted to fit the screw-threaded exterior of the connecting-bar. The bevel-gear is journaled in the bearing and prevented from longitudinal movement by means of an annular groove r3, which is formed in the hub r4 of the gear, into which groove are received the arms r of the bearing, which permits the bevel-gear to be rotated on the screw-threaded portion of the connecting-bar. When the bevel-gear is rotated, a reciprocating motion is imparted to the connecting-bar, which is Aconnected to the cranks of the shafts, thereby varying the openings between the slats simultaneously to conform with the size or kind of grain it is desired to separate. A similar beveled gear s is fitted to one end of a suitable shaft s and securely attached thereto by means of a pin, which passes through lfrom either side of the separator.

apertures in the hub of the gear and shaft. The gear is adapted to and does mesh with the gear secured to the connecting-bar. One end of the shaft is supported by the bearing s2, and the opposite end is supported by the projecting end s3 of the U-shaped bearing. It will be noted that the U-shaped bearing has two projecting ends, the purpose of which is to aordrfacilities for adjusting the slats This is accomplished by changing the gear and shaft to the opposite side of the frame and securing them to the frame in the same manner as described. The bearings in the frame, which support the crank-shafts, are made to it the crank-shafts and of such a depth as will leave the periphery of the shafts iush with the surface of the framework. Ribs d and d2 are provided and secured to the frame by any suitable fastening means directly over the bearings, forming a complete journal for the shafts. The center bar, in connection with the rib d2, forms a complete case for the connecting-bar and cranks of the shafts, preventing the chad and grain from interfering with the adjusting mechanism. In mounting the slats on the shafts as described the openings between them are brought in a direct line with the air-blast, giving the air free and unobstructed passage, thereby facilitating the cleaning process.

Slight changes and modifications can be made in constructing the sieve without deviating from the principle involved in our invention.

What we claim as our invention, and desire to secure by Letters Patent, is

l. A sieve comprising a frame, crank-shafts extending across the frame and journaled therein and having slats attached thereto, the cranks entirely incased in a cross-bar of the frame and a draw-bar similarly incased and connected to the cranks whereby to simultaneously rock the slats when moved endwise.

2. A sieve comprising a frame, crank-shafts journaled in open bearings in one side of the cross-bars of the frame and the cranks extending toward the opposite surface of the frame and confined between the two surfaces of the frame, said shafts having slats attached thereto and a draw-bar entirely incased between the surfaces of the frame and connected with the cranks whereby to move the slats simultaneously when reciprocated, and cleats secured to the cross-bars of the frame over the bearings to confine the shafts therein.

3. A sieve comprising a frame having a hollow central cross-bar which has the triple function of a brace, a casing and bearing, crank-shafts journaled in the several crossbars of the frame, the cranks extending into the hollow central cross-bar, and a draw-bar located within this hollow cross-bar and connecting the shafts, and slats attached to the shafts.

4. A sieve comprising a frame composed of side, end and cross bars, crank-shafts jour- ICO IIO

naled in the end and cross bars, slats attached to the shafts, and a draw-bai` connected with the cranks and extending through one of the side bars between the planes of the two surfaces of the frame, and means located between the same planes for moving the drawbar endwise.

5. A sieve the frame of which is composed of side, end and cross bars, in combination with crank-shafts journaled in the end and cross bars, slats attached to the shafts, a draw-bar extending through a side of the frame in the plane between the surfaces of the frame and connected with the several cranks of the shafts, the outer end of the draw-bar screw-threaded, a gear-wheel swiveled to the side of the frame, and having a threaded bore which turns on the threads ofV slats secured to the shafts, a draw-bar connected to the cranks, said draw-bar havinga screw-threaded outer end which protrudes beyond the end of the frame, a bevel-pinion ciroumferentially grooved and having a threaded bore which turns on the threads of the drawbar, a pair of brackets secured to the frame having lips which extend into the groove in the pinion and which have bearings, an operating-shaft which turns therein, anda bevelpinion removably secured to the shaft and `ELMER E. DITCH. FRANK M. HAVVKINS.

Witnesses:

JOHN H. Goss, J. N. PATTERSON. 

